Gas chromatograph



FIG. 1 is a front, right side and top perspective view of a gas chromatograph of the present invention;

FIG. 2 is a front, bottom and right side perspective view of the FIG. 1 gas chromatograph;

FIG. 3 is a front elevational view of the FIG. 1 gas chromatograph;

FIG. 4 is a rear elevational view of the FIG. 1 gas chromatograph;

FIG. 5 is a left side elevational view of the FIG. 1 gas chromatograph;

FIG. 6 is a right side elevational view of the FIG. 1 gas chromatograph; and,

FIG. 7 is a bottom plan view of the FIG. 1 gas chromatograph. 

The ornamental design for a gas chromatograph, as shown and described. 